Update README.md

Author: v0lta

README.md

@@ -103,7 +103,7 @@ with
 
 $$\mathbf{V} \in \mathbb{R}^{n,n}, \mathbf{F} \in \mathbb{R}^{n,n}, \Sigma^{\dagger} \in \mathbb{R}^{n,m}, \mathbf{U} \in \mathbb{R}^{m,m} \text{ and } \mathbf{b} \in \mathbb{R}^{m,1}.$$
 
-Setting $m=300$ turns $A$ into a square matrix. In this case, the zero block in the sigma-matrix disappears.
+Setting $n=300$ turns $A$ into a square matrix. In this case, the zero block in the sigma-matrix disappears.
 Plot the result for epsilon equal to 0.1, 1e-6, and 1e-12.
 
 #### Model Complexity (Optional):